/Engine/Plugins/Runtime/RigVM/Source/RigVM/Public/RigVMCore/RigVMByteCode.h
Returns the byte index of the first operand for this instructions
uint64 GetFirstOperandByteIndex ( const [FRigVMInstruction](API\Plugins\RigVM\RigVMCore\FRigVMInstruction) & InInstruction ) const